Designed for use with circular cutouts, these panels have gaskets that form a tight seal to keep out dust and moisture.

Install on circular cutouts to access and inspect the interior of tanks and hoppers.

The window and body are made from a single piece of plastic, making these sights more shatter resistant than sights with a glass window.

View tank contents from multiple angles through the plastic domed window.

Continuously monitor oil quality through the clear plastic reservoir and use the attached drain valve to remove water accumulation.

Often used in kilns and other heating equipment, these sights have a quartz window that can withstand temperatures up to 1600° F. They're also known as peep sights.

Weld these sights to single-wall tanks.

Press these sights into a hole in your tank wall; no additional mounting nuts are needed. They mount from the outside.

An extended flange makes these sights easy to bolt onto tank walls.

Designed with quick-clamp (KF) connections, these sights connect to a port on a high-vacuum chamber, so you can monitor what's happening inside.

Also known as cleanouts, panels cover cutouts in duct to provide access for inspection and cleaning.

Access the inside of lines, so you can vent pressure, drain liquid, or take samples. Made of black-coated steel, these bleed rings should be used in dry environments to prevent rusting.